New 2020 head-to-heads in national Quinnipiac poll just out:

Biden 53%, Trump 40%
Sanders 51%, Trump 42%
Harris 49%, Trump 41%
Warren 49%, Trump 42%
Buttigieg 47%, Trump 42%
Booker 47%, Trump 42%

— Ryan Struyk (@ryanstruyk) June 11, 2019